Hydraulic packer



, operation, and in carrying: out such provide a hydraulic packer,

manipulation of equipmenthe rotation of the pipe,

' provide a hydraulic embodiment oi the present invention; and

Eatented Feb. 29,1944

,uun'so STAT v Thomas V. Moore, Houston, Tex}, Standard OllDevelopment Company, a

ration of it is usual to term a temporary the drill pipe and the wallsvoi' the ho open and close valves below the packer b ment of the drilivpipe. An object o! the present invention vide a packer tor-use in bore holes. 1,

Another obiect of the present invent! suitablerior ment in astring of pipe A further object of the I release valve which iluidoi the packer 1 me ing pressure. I I

Other objects and advan invention may be seen irom following description taken in V the accompanying drawing in Fig. 1 is an elevation showings cording to the present inventi" pipe within a bore hole; e Fig. 2.1a an elevation thep'ockerlnastringotpipe; mu; a .o

1'18. 3 is a cross sectional Fig.4 is a fragmentary view illustrating a pottion 01 the device shown inglllgi; on a large suitable material and mayi bei reiniorced;{if necessary, with longitudinal snaps; of ,flexible,

steel, is attached to up plungerjsectionjull 'by clamp 2'2 and lower plunger ,sectiontHjfiYlIciamp II. This packer assemblyfis garransied; in'ia string of pipe, the upper plunger sectioniilfind lower section llbeing secured in thestring'l of pipe ll by meansoi conventional'tojol Joints- Y A detail of a'pa'ckefolampond" iri teriorlar rangement oi the packer isj'shown -inl lg 2;

The packer clamp comprises. aninnerfanndlar'.

mum II which itsouter.suriace -irr the Application; July 22, muse h ckl the P n w by h Referring specifically tothe andiitst. to Fig. 1, packer body It which consiste'essentially 01' an elastic sleeve ot" rubberf;;ior other E5 PATENT,

' 1.3 1;! cylindricailihndzdi i simneuitmsectioniirb end of i c wwthrealdsi int order wkinz clampgfl ironrdownward movement with respectitoj plunger hut-leavingfiitireerto rotateeabouta the p r I g! otate] or 11love v lo'n linger section It.

will qbefseen' fromv a. study ger section'is in efiect a setot iarsfor'an when;

7 channels 28.; 7 wer plunger section I thesam'e" insidedlameter and being attached ,together bymatingsorew upper ,.extendinz-. shoulder 3 l4 proportioned to fit slidb tw'o surfaces.

"venting rotative movement.

The packer assembly may allowing longitudinal movement between the int snus r lf ndithe' l nze l 3 has ensured; {Racking It.

cn t cwon 'eotmd hephmsermflon s ctionqlrntsf a -P li'shedl'f0-ellow; m m nt; n:-

scope of iluid. from the' I Up'per m kinrj'cumbj r2 is ri-ee WI- ll "1 L or telescoping tubing, 'thesectlons which 'may 1' nove-'longitudinally, but are 're-' .fromrotating with} respect to each -UDp er'plunter'-section II' is tubular in wardly' projecting shoulder 21.- Shoulder :21 {is iprovi'ded" witha-plurality or longltudinallyfiex m i s nstructed as two tubular part's 29 and "havingv 45 '{en'dfot member 2a is provided with outwardly ns y w th n upperplunger section is anafnues I with packingiiito prevent leakage'betweenzthe Member is also provided with 1 1 ribs "which slldewithin channels lltherehyj and lower plunger sections; while-pre-y lso be withapressure-release'valve Zi ,'"the functiona I which is to prevent building up too great a hydraullc pressure on the packer body. The portions of the telescoping tubular members it and associated with valve 2| are shown in Fig. 2

and in greater detail in Fig. 4. Release valve Il may advantageously be mounted on the head of tubular member 29, passages 33 extending through the head of member 29 and passage 34 through shoulder 21 allowing free fluid communication between the release valve and the working fluid in the hydraulic packer.

No specific form of the pressure release valve to be employed has been shown here as there are a number of suitable types which may be used for this purpose. For example, spring loaded release valves are well known for the release of excess pressure from a container and are suitable for this purpose. Other types are also known and may be utilized if desired.

In operation, the plunger section is assembled and the pressure release valve set at a value'which will be a safe working pressurefor the packer body. The packer body and lower clamp are then placed in position and with the plunger sections intheir maximum extended position packer body it is filled with an incompressible and preferably viscous liquid 35. The

upper clamp is then secured in position and the assembly made up in a string of pipe. The packer is arranged in the pipe at such position that the lower end of the drill pipe will rest on the bottom of the hole when the packer is at the desired level in the bore hole.

The drill pipe with the packer is thenlowered into the bore hole until the lower end of the pipe rests on the bottom. Further lowering of the upper end of the pipe causes the plunger sections ll and I! to telescope together, this movement increasing the volume of that portion of the plunger body within the packer, displacing liquid 35 to cause the packer'body to swell'outwardly and seal against the side of the bore hole. I

It will be evident that the packer of the present invention has several advantages'over those known to the prior art some of the outstanding characteristics are: (1) in setting. there is no scraping action of the packer against the walls of the hole, (2) the packer can accommodate itself to holes or irregular shape, and (3) the pressure release valve will prevent the pressure of the working fluid from becoming excessively great.

Although the particular embodiment described is a wall packer, the same principle is applicable to other bore hole tools, such as to rathole and other packers. It will also be apparent that various changes in the shape, size and proportion of the several parts of the emman, and it is my intention that such changes be embraced by the hereto appended claims.

I claim:

1. A packer adapted to be used in bore holes comprising, in combination, a first tubular member, a second tubular member arranged to move longitudinally in said first tubular member, means to prevent fluid leakage between said first and said second tubular members, an elastic sleeve having one end slidably mounted on one or said members and the other end slidingly secured to the other tubular member in a fiuidtight manner, and a liquid arrangedln the space defined by said sleeve and said tubular members.

2. A. device in accordance with claim 1 in which said device is provided with means to prevent relative rotative motion between said tubular members.

3. A packer adapted to be used in boreholes comprising, in combination, a first tubular member, a second tubular member arranged for longitudinal movement in said first tubular member, means to prevent fluid leakage between said first and second tubular members, an elastic sleeve, first and second glands slidably arranged on said first and second tubular members re-- spectively, and clamping means securing one end of said sleeve to the first gland, and the other end of the sleeve to the second gland in a fiuid tight manner.

4. In a packer adapted to be used in boreholes, an elastic sleeve and means slidably securing said sleeve to a tubular member including a gland member having a conical outside surface and slidingly fitting on said sleeve, a ring member arranged around said. gland member with its inside surface slanting in the same directidn as the conical surface of said gland and spaced away from said gland to define a passage for receiving an end of said sleeve, and means arranged for biasing the conical surface 01' said gland member toward the slanting surface of said ring member to secure the sleeve in said passage.

5. In a-packer adapted to be used in boreholes, an elastic sleeve, means securing said sleeve to a tubular member including aring member provided with a conical outside surface slidingly arranged on said tubular member, a circumferential groove cut in the inside surface of said bod ment shown may be made by a skilled workso sleeve, a packing ring arranged in said groove, a second ring member having a conically shaped inside surface arranged to cooperate with said first ring member to define a passage for receiving an end of said elastic sleeve, and means secured to said second ring member adapted to move the ring members in a direction to diminish the width of said passage.

THOMAS V'. MOORE. 

